Mtg card price quetion, 10 pts.?

Question

so im looking arround the interwebs and there is a great diference in prices for the following cards, i would like some help finding out prices, what would you pay,

1, Mutavault

2, Temple Garden (foil)

3, Troll Ascetic

4, Oona, Queen of the Fae

5, Spellweaver Helix

6, Glimpse the Untinkable

7, Paladin en-Vec (X edition)

Answer 1

around $175